diff --git a/src/argparse.lua b/src/argparse.lua
index 0eb463a..43d23a7 100644
--- a/src/argparse.lua
+++ b/src/argparse.lua
@@ -1389,6 +1389,12 @@ function Parser:pparse(args)
    end
 end
 
-return function(...)
+local argparse = {}
+
+argparse.version = "0.5.0"
+
+setmetatable(argparse, {__call = function(_, ...)
    return Parser(default_cmdline[0]):add_help(true)(...)
-end
+end})
+
+return argparse